docs: def _parse_page(self, query):
          """
          Parse the querystring args for pagination.
  
          :param query: Dict of query args
          """
          args = {k[5:-1]: v for k, v in query.items() if k.startswith('page[')}
  
          if {'number', 'size'} == set(args.keys()):
              if not args['number'].isdecimal() or not args['size'].isdecimal():
                  raise BadRequestError('Page query parameters must be integers')
  
              number = int(args['number'])
              size = int(args['size'])
              start = number * size
  
              return start, start + size - 1
  
          if {'limit', 'offset'} == set(args.keys()):
              if not args['limit'].isdecimal() or not args['offset'].isdecimal():
                  raise BadRequestError('Page query parameters must be integers')
  
              limit = int(args['limit'])
              offset = int(args['offset'])
  
              return offset, offset + limit - 1
  
          return 0, None